About RF Cafe

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its
primary purpose was to provide me with ready access to commonly needed formulas and reference
material while performing my work as an RF system and circuit design engineer. The Internet was
still largely an unknown entity at the time and not much was available in the form of WYSIWYG
...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the
RF Cafe website are hereby acknowledged.

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Homepage Archive October 2013

These archive pages are provided in order to make it easier for you to find items that you remember seeing on the RF Cafe homepage. Of course
probably the easiest way to find anything on the website is to use the "Search
RF Cafe" box at the top of every page.

Increasing women's roles and interest in STEM
(science, technology, engineering, mathematics) careers has been a major effort by schools
in the last couple decades in an attempt to 'remove barriers,' both real and perceived, inhibiting entrance into the fields.
There are still many realms of STEM that women have avoided, but computer programming and mathematics are examples their
representation having seen steady increases.
Dr. Frances
Bauer can be seen in this 1955 Popular Science story on Project Cyclone, which reports on her role programming what
was at the time one of the largest computers in the world. Her work ran the gamut between civil engineering on bridge projects
to predicting missile flight paths for the military. You might recall the U.S. Navy's
Grace Hopper, who is credited with coining the term
"bug" for computers.

Here
is a short primer by Daniel Chow on the basics of
digital
signal spectra(EDN website). It begins with the Fourier transform of a single rectangular
pulse and progresses through the spectrum of a series of data pulses and of non-rectangular pulses.

Electronic Treasures of theSarnoff Collection: IEEE

RCA and the name David Sarnoff seem to be
showing up a lot lately, at least in the venues I travel for technical reading. I don't see particular dates mentioned that
make this the anniversary of anything related. Ironically, this mention of the two names together adds to the phenomenon.
The October 2013 edition of IEEE's Spectrum magazine has a nice spread titled, "Electronic Treasures of the David Sarnoff
Collection." RCA, the Radio Corporation of America, was founded in 1919 in Princeton, New Jersey
(home base of Mr. Einstein, amongst other notables). David Sarnoff, chairman of RCA, was the
son of a Jewish immigrant. Although neither a scientist nor an inventor himself, Sarnoff established a record of ambition
and business savvy from a young age - although he was an accomplished telegraph operator (participated
in the rescue efforts of the Titanic)...

Please visit KR Electronicsin Appreciation of Support

For over 40 years KR Electronics
(an RF Cafe supporter since 2009) has designed and manufactured high quality filters for the commercial and military markets. KR Electronics manufactures all filter
types and individually synthesizes filters for special applications. State of the art computer synthesis, analysis
and test methods are used to meet the most challenging specifications. All the standard topologies are supplied along with
diplexers, linear phase, group delay equalizers, and many custom designs.

Carl and Jerry: Ham Radio

Here is another exciting episode of the sleuthing
adventures starring Popular Electronics' tech savvy teenagers,
Carl
and Jerry. The Hardy Boys of electronics are the creation of author John T. Frye, who created short story adventures
for many years - long enough to at one point require a major modification in their appearances to reflect more modern attire
and eyewear. This particular adventure begins with Carl considering whether his ham radio hobby is more useful from its
technical aspects or its social aspects.

everything RF Intros New RF &Microwave Products at EuMW

The European Microwave
Week is the largest Event for the RF & Microwave Industry in Europe. This year it is being held in Nuremberg, Germany
from the 6th to the 11th of October. There are over 200 Companies that are taking part in the exhibition here. Today's newsletter
lists some new products that have been announced this week at the EuMW 2013.

Electronics for Tomorrow

Cooling devices based on the Peltier effect were
first demonstrated by French physicist
Jean Charles Athanase Peltier when he noted the presence of heating or cooling at an electrified junction of two different
conductors types (opposite of a thermocouple). Widespread commercial use depended on finding
efficient materials that could be produced inexpensively. Music synthesizers, to be practical, needed to await the availability
of miniaturized electronics like transistors and memory elements. Light amplification similarly depended on affordable sources
to be anything more than a laboratory curiosity. Fortunately, by the mid 1950s such entities were becoming reality. This
article reports on a few of those items.

Excel 2013 BibleRF Cafe Featured Book

Excel 2013 Bible, by
John Walkenbach. Engineers still rely pretty heavily on spreadsheets for day-to-day work. The full-featured simulators are
invaluable for detailed simulations, but often are severe overkill for a quick calculation. Known as "Mr. Spreadsheet,"
Walkenbach shows you how to maximize the power of Excel 2013 while bringing you up to speed on the latest features. This
perennial bestseller is fully updated to cover all the new features of Excel 2013, including how to navigate the user interface,
take advantage of various file formats, master formulas, analyze data with PivotTables, and more.

X-Ray Inspection

X-ray inspection capability is a vital tool not just in medicine
busigat in industry. During my tenure with a major cellphone power amplifier company as an RF Applications Engineer, I relied
heavily on x-ray imaging for many of the teardown reports that I wrote on competitors' products. It included everything
from determining metal layers in integrated circuits to deducing multi-layer ceramic PCB routing lines and distributed components
to just getting a quick look inside a shielded enclosure without needing to disassemble it. A skilled x-ray technician can
make a huge difference in the quality of information that can be gleaned from the images since angle, power level, and focusing
takes a deft touch. My first experience with using x-rays for inspection was while doing automated test system design for
production base station equipment companies. Very stringent PIM...

Notable Tech Quote

"If something cant be explained
off the back of an envelope, its rubbish." -
Richard Branson,
Virgin CEO

Every Sunday I create a
crossword puzzle using a
word list that I personally created and added to during over a decade of making puzzles. All of the words are related to
engineering, science, mathematics, chemistry, astronomy, etc. There are no numbnut clues about movie stars or clothing designers.

How to Solder

Proper
soldering is almost as much of an art form as it is a technical skill. Having been through numerous soldering classes in
my career, starting with electrical vocational courses in high school, then again in USAF technical school, and other times
while working as a technician and engineer, I always exercise care in making solder joints. Proper preparation - including
both tinning of mating surfaces and a means to prevent the joint members from moving during cool-down - is of utmost importance
for assuring a nice, smooth, shiny joint with just the right amount of solder. Lead-free solders do not tend to produce
the level of shininess as do the good old 60-40 type tin-lead solders, but you can still make a nice looking joint. This
might be more information than you want to know about me, but I even strive for perfection in solder joints in copper pipes
and fittings used in plumbing work. Call me a masochist, eco-villain, or worse, but...

Triad RF Systems andDCH Systems Join Forces

On May 1st, 2013, DCH Systems, EIN 20-4638136
and Triad RF Systems, Inc., EIN 27-3907731, merged into one entity with the Triad RF Systems, Inc. name surviving. Triad RF Systems is fully owned by three (3) partners: Dean Handrinos,
Steve Barthelmes, and David Campbell. Triad RF Systems, was formed with the objective to solve the problem of high power
amplifiers (HPAs) being the Achille's heel in most RF radios. We have solutions for integrating high performance HPAs into
sophisticated RF subsystems and systems without sacrificing efficiency and linearity. Triad RF Systems serves all areas
of the RF and Microwave industries including military, satellite and commercial communications.

Audio Quizfrom Popular Electronics

There are a lot of
audiophiles
in the RF Cafe audience, so this 10-question quiz about audio topics from Popular Electronics should prove useful. It covers
not just the physical aspects but also some simple electronics concepts, like decibels of gain, crossover networks, push-pull
amplifiers, etc. Enjoy.

PMI Intros 1 to 40 GHz Ultra-Wideband Low Noise Amplifier

PMI Model No. PEC-42-1G40G-20-12-292FF is a 1.0 to 40 GHz,
ultra-wideband low noise
amplifier that provides 42 dB of gain typically with a typical noise figure of 5.5 dB. The OP1dB is typically
+22 dBm (1.0 to 18.0 GHz) and +19 dBm (18.0 to 40.0 GHz).
The maximum input power rating is +17 dBm CW and the operating DC supply is 550 mA at +12 to +15 VDC. This
unit is supplied in a package measuring 1.37" x 1.0" x 0.6" with 2.92 mm female connectors.

Many Thanks to Alliance TestEquipment for Support!

Alliance Test is a trusted source providing
sales, rentals and leasing of refurbished electronic test and measurement
equipment to the R&D, manufacturing and quality assurance industries. We carry a full range of used test equipment
from manufacturers such as Agilent, Ando, Anritsu, Fluke, HP, Keithley, Lecroy, Rohde & Schwarz, and Tektronix. Recover
30%-40% more on your idle test equipment rather than selling to a dealer.

Sherlock Ohms is a regular feature of the Design News website where readers submit anecdotes from
their on-the-job experiences. There has been a tendency lately in this column and, to a lesser degree, in the similar
Tales from the Cube column for situations involving newer, less experienced engineers being frustrated by the domineering
attitudes of some senior engineers. In contrast, I cannot recall an instance of a story where the senior engineer dumps
on stupid actions of a newbie. Maybe doing so is considered bullying or akin to a guy hitting a girl. Regardless, all the
stories in both columns are good for instruction...

Interface Coiled TubingLoad Cells

Coil tubing load cells are used for measuring the insertion force of small diameter (typically
0.5 to 4.5 inch) stainless steel tubing that is inserted into the borehole / wellbore at the wellhead. A borehole
is any hole drilled for the purpose of exploration or extraction of natural resources such as water, gas or oil where a
well is being produced. The coil tubing (CT) is usually installed when the well, which has
been drilled, is deemed ‘viable’ and will produce the natural resource in a productive and economic manner. Coil tubing
provides intervention allowance of vertical, horizontal, highly deviated, and live wells(1). Adding

How to Read and Understandan Antenna Data Sheet

A white paper has been published by Linx
Technologies titled, "How to Understand an Antenna Data Sheet." Author, Shawn Hogan, VP of Engineering, writes, "The information
on an antenna data sheet is nothing short of overwhelming. It can be difficult to maneuver through to select the best antenna
for your design. There are several factors to take into account when looking at an antenna data sheet including: monopole
vs. dipole antennas, the electrical parameters, counterpoise, gain and radiation pattern. Our goal is to break down these
features so you can use that knowledge to discover advantages and disadvantages of different antennas as they relate to
your specific application..."

RCA Cunningham Radiotron Ad

Have you seen the new national advertising campaign
where Freescale (formerly Motorola) is using big name celebrities to sell their cellular base
station power transistors? Scarlett Johansson and Ashton Kutcher are up on a tower along with man-and-woman-on-the-tower smartphone
users discussing how much better their phones work now that the service provider switched to base transceiver stations that
use Freescale LDMOS RF power transistors. Of course you haven't seen the ad because it would never be produced and marketed.
The very concept is ridiculous, you might say... unless you happened to see advertisements like this one for RCA's Radiotron
vacuum tubes from the 1930s. In it, none other than Bing Crosby...

Advanced Test EquipmentRentals October Newsletter

Advanced Test Equipment
Rentals just issued their Tech Talk newsletter for October 2013. It includes hot topics in the tech news world and highlights
of new or special function test equipment they have available. Please click on the thumbnail to access the original versions.

Leveraging next generation hardware and software
innovations that are part of Empower's "size matters" architecture, several unique configurations of these HPAs are being
shipped to key customers. This particular set of HPAs build on the size, weight and power advantages already demonstrated
with commercial product releases in the broad market, "size matters" product family. This recent and unique
SATCOM solution delivers 2 kW P1dB (CW,
digital modulated signal) in L-Band and a companion product delivers 800 W P1dB
(CW, digital modulated signal) in S-Band. The 2 kW L-Band HPA is a GaN based design and housed in an amazingly
small 5U chassis.

Federal Circuit PondersAbandoning De Novo Review

Being involved as
an Expert Witness for a court case involving product liability and/or IP ownership or infringement is a unique
experience according to those who have been through it. Having competent and renowned legal representation is paramount
to success, particularly if your opponent is
well equipped. IMS ExpertServices is a law firm specializing in expert witness
cases. Every month or so they send me an article about specific court cases that could be of interest to RF Cafe visitors.
This particular article is titled "Federal Circuit Ponders Abandoning De Novo Review." Overturning precedence is notoriously
difficult since doing can have ramifications that reach way back in time and can trigger appeals to long-settled court cases.
This potential for the overturning of a patent infringement case from 1998 based on how it was constructed is predicted
to trigger significant consequences for past and future litigation...

Thanks Once Again to Vida RFfor Continued Support

The goal at Vida RF is to design and manufacture a reliable and cost-effective RF / Microwave Component that fits each customer's individual application. Vida RF has the capability
to produce large volume as well as quick turnaround for your custom designs, and they will provide the highest standards
of quality products, competitive prices, quick turnaround and exceptional customer service. RF connectors, cable assemblies,
power dividers, RF adapters & terminations, fixed attenuators, dust caps, directional couplers, and i isolators &
circulators are among their offerings.

Music to the Earsof an Engineer

We technically oriented
types often think of those with an artsy-fartsy bent as ones who run for the tall grass when topics of science and/or
mathematics arise. Other than engineers, scientists, financiers, etc., I would say in most cases it is justified - but not
always. In the September 2013 edition of Strings magazine, an article titled, "How the Violin Altered Our View of the Universe" appeared where author Paul Stein, a violinist, educator,
and member of the Los Angeles Philharmonic, evidenced a very good grasp of science and math principles. The very decision
to pen such an article had to have been born of a knowledge and comfort with the aforementioned. A subtitle of, "Physicist &
violinist Albert Einstein's cosmic orchestra resonates with the music of the spheres," proves familiarity of Isaac Newton's
"Music of the Spheres," (Musica Universalis)...

Featured Book

The Electric Vehicle Conversion Handbook, by Mark Warner,
is a guide on how to convert any gas- or diesel-powered vehicle to electric power. Includes ownership advantages, basic
EV operation, subsystems, components, basic EV operation, project vehicles, and conversion kits. Motor and battery technology
is advancing at amazing rates, so if you don't like the weenie look of today's production electrical vehicles and would
rather try your hand at an electric conversion on a classic 1965 Mustang, then this type of resource can be invaluable.

Ponderings on PowerMeasurements - RF Cafe

Joe Cahak, owner of Sunshine Design Engineering Services,
has submitted another fine article for posting here. Joe has many years of automated RF testing experience to leverage when
writing this paper on the basics of power measurement. A
power measurement is
a scalar quantity and is a measure of power detected. These measurements can be made a variety of ways. Most of us are familiar
with the notion that voltage (volts) multiplied by current (amps) is power (watts) and power multiplied by time is energy.
At DC or low frequencies these power measurements from the current or voltage is relatively easy and not very complicated...

RF Cafe Quiz #54Microwave Mixer Technology

This quiz is based on the information presented
in
Microwave Mixer Technology and Applications, by Bert Henderson and Edmar Camargo. Some of these books are available as prizes in the monthly
RF Cafe Giveaway. Based on a review of over one
thousand patents on mixers and frequency conversion, the authors have written a comprehensive book for mixer designers who
want solid ideas for solving their own design challenges. Many of the important and most interesting patents and related
circuits are discussed in the several application oriented chapters.

Notable Quote

"...I
have always maintained that, excepting fools, men did not differ much in intellect, only in zeal and hard work; and I still
think there is an eminently important difference." -
Charles Darwin, letter citing R. Pearson (1914-1930) in The Life, Letters and
Labours of Francis Galton, TodayInScience

British Radio HoaxTraps "Pirate" Listeners

When you think of radio
pirate, most likely what comes to mind is a rogue, unlicensed transmitter that is re-broadcasting copyrighted material,
syndicated shows, etc., on radio or television. Nowadays that would also include the Internet as a medium. Did you know
that, at least decades ago, the British government (and maybe others) charged citizens a
fee for listening to broadcasts
on their household radios? That's right, if you wanted to listen to the BBC, you would kindly remit a fee of 10 shillings
per year. Otherwise, you were apt to have government inspectors descend upon you and padlock your radio set - or collect
the requisite 10 shillings on the spot. After a growing number of suspected dishonest British subjects finally exceeded
the reasonable level of tolerance of the government, a clever scheme was devised to trick evil citizens into divulging their
nefarious crimes...

Thanks to Rohde & Schwarzfor Their Continued Support!

Rohde & Schwarz is
one of the world's leading manufacturers of test & measurement, communications and broadcasting equipment.
Network
analyzers, signal analyzers,
spectrum
analyzers, and signal generators for analog, RF, microwave, and mm-wave signals with a standards, modulations, and functions
available at up to 43.5 GHz. Digital Oscilloscopes for RF, analog, mixed signal & digital integration, and software development &
production up to 4 GHz BW. RF Power Meters up to 110 GHz.

Inc's 2013 Surveyof Entrepreneurs

Most people, according to surveys, consider starting their own
businesses at some time during their working years. The risk of failure and the cost of startup are what prevent most elsewise
entrepreneurs from taking the leap of faith in their own abilities. Not everyone is cut out for running a business whether
it be a one-person venture or a conglomerate with a payrolls of hundreds. Knowing and heeding your own limitation in deciding
to remain under the employ of another company is as virtuous and sound a reason for dismissing thoughts for self-employment
as is having the knowledge and will to strike out on your own. A lot of business are started on the sideline while being
employed fulltime in a regular job. Indeed, that was RF Cafe's origin. It wasn't until I had confidence that I could subsist
on RF Cafe's revenue level that I left the security of the best engineering job I ever had to tend to the website full-time
(at a substantial reduction in pay, I will add).
Every year or so,
Inc magazine does a major poll of successful entrepreneurs to find out what motivates them (2013 Inc 5000)...

Physics & EngineeringCrossword for 10-6-2013

Every Sunday I create a
crossword puzzle using a word
list that I personally created and added to during over a decade of making puzzles. All of the words are related to engineering,
science, mathematics, chemistry, astronomy, etc. There are no numbnut clues about movie stars or clothing designers. Enjoy.

Many Thanks to Nortec RFfor Continued Support!

Nortec RF has more than 22 years
of experience designing power combiners and dividers, directional couplers, hybrid couplers, filters, and power amplifiers.
Their research and development group and engineering team constantly introduces new, top of the line products into our
RF and microwave components product line.

Fairview Microwave OffersSchottky Diode Detectors

Fairview Microwave announces
a new line of in-stock Zero Bias Schottky Diode
Detectors. Diode Detectors are used to rectify an RF input signal to a proportional DC output voltage. Applications
for Zero Bias Schottky Diode Detectors include precision and lab testing equipment, as well as transmitter, power and signal
monitoring systems. Fairview's new line of Zero Bias Schottky Diode Detectors comes in several different connector configurations
and frequencies in the 0.01 to 26.5 GHz range.

1-800-318-2596

That is the phone number for signing up for America's new Affordable
Care Act. Do you believe it is just a coincidence that it spells out "1-800-F1U-CKYO?" I kid you not. From what information I could find, the lowest cost plan for Melanie
and me is the Bronze plan, which will cost $9,481 with a $12,700 deductible (only 60% coverage after
deductible is met). My current private plan through BCBS with a $7,000 deductible (90% coverage
after deductible is met) is only $4,971. So, beginning in January 2014 that represents a 91% increase in cost and
a $5,700 higher deductible, plus only 60% coverage after the deductible is met. I do not qualify for any subsidy. To all
my fellow Americans that voted for this crap - thanks a lot!

Modern Radio Practice inUsing Graphs and Charts

Using
charts and nomographs to solve calculations is not as common in today's world of portable high-powered computers
as it was when computers used vacuum tubes or even mechanical gears. One exception might be the Smith chart, especially
in the lab or field. You can plug numbers into a programmable calculator or tablet app, but having the solution presented
in the form of a number gives you only that - a number. That's usually good enough, but if you are doing troubleshooting
or tweaking a design, being able to see how the value got to be what it is by seeing what's around it can be very helpful.
The Smith chart is a particularly good example when watching the complex impedance point move around. The more experience
you have, the less you need such devices, but newbies...

JobLens™: Nokia's AugmentedReality Job Search App

Are you in the market for a new job as an intern, part-time,
temporary, or full-time worker and are not quite sure how to go about finding out where the kind of employment you are seeking
is located? Wouldn't it be nice if you could simply drive or walk around town and any place that fit the bill would be highlighted
for you automatically? Nokia has an app for that, and it's called JobLens™. Using what is termed "Augmented Reality," JobLens assimilates a multitude of social networking
services like LinkedIn, Facebook, Twitter, Indeed, Here Maps, Windows Live, Salary.com, Zillow, CareerOneStop, Data.uk.gov,
Payscale, and other best-in-class content partners along with other location-dependent resources to pinpoint targets for
investigation. It might be a little underpowered when looking for an engineering type position...

Radio Fever - Using HF ElectricFields in Modern Medicine

"My God, man! Drilling holes in his head isn't the
answer! Now put away your butcher knives and let me save this patient before it's too late!" Those classic words were uttered
by Dr. McCoy in Star Trek IV: The Voyage Home, after Lt. Chekov (promoted from Ensign after
the TV series) sustained brain damage as a result of falling from a 'nuclear wessel' when 20th century naval surgeons
were about to open his skull to relieve pressure from swelling. Looking at these images from a 1932 article on using
radio waves "to produce protective
fever in killing germs of a number of diseases." Update: I have been informed that shortwave
diathermy is still used in modern medicine! 10 to 30 meters was a popular wavelength band at a power of about
500 watts. The patient's body part to be treated is placed between the plates to act "as a dielectric" while the liquids
are heated via induced oscillations similar to how a microwave oven...

Interface – Driven to Perform

To succeed in automotive racing,
a commitment is required... a commitment to always ask for more and to never settle for less. Continual improvement is necessary
to stay ahead of your competition and win. This drive to be the best is part of Interface's DNA, from our product and service
offering to the dedication of our employees. Accurate force measurement
is a vital requirement of the automotive industry and in the competition arena, performance demands are pushed even higher.
Interface takes great pride in being a leading solutions provider in these applications. Whether it's for NASCAR, IndyCar,
or even the amateur level, engineers rely on Interface.

Phenomena Underlying Radio

"Radio apparatus of today, including television,
uses practically all of the physical phenomena capable of being controlled by science." That is the opening line of a 1932
article discussing the relatively new technology dealing with the
generation
AND controlling of electrical charges. Investigators were beginning to develop formulas and physical rules for
the behavior of electrons - at least in accordance with the accepted Rutherford-Bohr atomic model. It wasn't until 1929
that Robert Van de Graaff invented his eponymous generator, before which scientists like Volta used an electrophorus
(Latin for "electricity bearer") to generate static electrical charges for experimentation
by beating a metal disc with an animal skin...

NuWaves Receives ISO 9001and AS9100 QMS Certifications

NuWaves Engineering,
an international RF and embedded systems solutions provider, announces
it has achieved both ISO 9001:2008 and AS9100:2009 Rev C certifications for its Quality Management System by EAGLE Registrations
Inc. "NuWaves is excited to join the top tier suppliers in our industry with these highly respected quality certifications,"
said Jeff Wells, President and CEO of NuWaves Engineering. "It's a testament to our employees and their dedication to delivering
quality products and services to our customers each and every day."

Congrats to SeptemberBook Winner Greg F. !!!

Greg
F., of Ft. Collins, CO, is the September 2013 book drawing winner. Greg selected Introduction to Antenna Analysis Using
EM Simulators. This book was graciously provided by Artech
House.

Linx Technologies
is pleased to announce its launch of the
TM Series Global Navigation Satellite System(GNSS) receiver modules.
At a very small size of 10mm x 10mm, the TM Series GNSS receiver module is a self-contained, high-performance Global Satellite
Navigation System receiver designed for navigation, asset tracking and positioning applications of all kinds. Based on the
MediaTek chipset, it can simultaneously acquire and track several satellite constellations. These include the United States
GPS system, Europe’s GALILEO, Russia’s GLONASS and Japan’s QZSS.

Planar Monolithics Industries
(PMI) has been set up to manufacture and market various MIC/MMIC components, supercomponents,
and subsystems for applications in telecommunications, terrestrial, satellite, and mobile-radio communications, defense
(ECM, ECCM, ESM, radars, and EW), cable-TV, navigation and marine electronics, FAA/DOT-avionics,
ground based systems, and microwave landing systems.

PhonebloksA Personalized Phone

As of this writing, at least 863,790 people
believe the concept of a modular, upgradable, personalized smartphone is a good enough idea to invest their support in it.
With 28 days left to go, the Phonebloks developers are already at 95% of their
crowdfunded revenue goal. As I reported a ways back, while Kickstarter was the first crowdfunding venue to receive wide
publicity, there are now many such options for soliciting project startup cash. The Phonebloks team chose Thunderclap. Thunderclap
is not actually a crowdfunding source but a 'crowdspeaking' scheme for gathering enthusiasts for your idea. If enough people
support your project, Thunderclap will blast out a timed Facebook Post or Tweet from all your supporters, creating a wave
of attention... for what it's worth. Phoneblok's concept is based on the belief that the current throw-away philosophy for
electronics devices - cellphones in particular - is wasteful not just in terms of money but in terms of...

Anatech Electronics has released
new designs for a 710-716 MHz / 740-746 MHz bandpass combiner, a 4.4 to 5 GHz surface mount isolator, a 769
to 775 MHz bandpass filter for Public Safety, and a 2500 to 2570/2620 to 2690 MHz cavity diplexer. All can be
ordered directly through our AMCrf web store.

Thanks for Continued Supportfrom Marvelous Microwave!

Marvelous Microwave is a professional supplier of Microwave/RF components,
for WiFi, Cellular, Bluetooth, GPS, DVB-T/S/C, Satellite Communication and related fields. A strong global channel and design
group devoted to development and innovation to meet various changeable market needs. We strive for low cost, fast service,
best prices, highest quality and "marvelous" service. Attenuators, connectors and cables, amplifiers, filters, and RF switches
are among their many offerings.

Featured Book

Electronic Warfare in the Information Age,
by D. Curtis Schleher. This is an advanced practitioner's guide to current concepts and threats associated with modern electronic
warfare (EW). It identifies and explains the newest radar communications threats, and provides
practical, "how-to" information on designing and implementing ECM and ECCM systems. The aim of the text is to help the reader
develop ESM systems designed specifically to exploit the vulnerabilities of modern radar. It also identifies and evaluates
ESM receiving equipment, and outlines advanced ECM methods, including monopulse deception, coherent radar jamming, and high-ERP
generation.

The Internet of Things:Building Blocks for Wireless

The Internet of Things is a term that is appearing
with much frequency these days (e.g., in this article). Akin to 3G and 4G, the definition
does not seem to be very well defined; that is to say more subjective than objective. Per Wikipedia's entry: "The Internet of Things refers to uniquely identifiable
objects and their virtual representations in an Internet-like structure. The term "Internet of Things" was proposed by Kevin
Ashton in 1999. The concept of the Internet of Things first became popular through the Auto-ID Center at MIT and related
market analysts publications. Radio-frequency identification (RFID) is often seen as a prerequisite
for the Internet of Things. If all objects and people in daily life were equipped with identifiers, they could be managed
and inventoried by computers. Besides using RFID...